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-rw-r--r--include/GL/glxext.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/GL/glxext.h b/include/GL/glxext.h
index 33bbc441d77..e61ad526f74 100644
--- a/include/GL/glxext.h
+++ b/include/GL/glxext.h
@@ -413,7 +413,7 @@ typedef void ( * PFNGLXDESTROYGLXVIDEOSOURCESGIXPROC) (Display *dpy, GLXVideoSou
#ifdef GLX_GLXEXT_PROTOTYPES
extern Display * glXGetCurrentDisplayEXT (void);
extern int glXQueryContextInfoEXT (Display *, GLXContext, int, int *);
-extern GLXContextID glXGetContextIDEXT (GLXContext);
+extern GLXContextID glXGetContextIDEXT (const GLXContext);
extern GLXContext glXImportContextEXT (Display *, GLXContextID);
extern void glXFreeContextEXT (Display *, GLXContext);
#endif /* GLX_GLXEXT_PROTOTYPES */